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Try adding the scale filter, e.g. -vf spp,scale instead of -vf spp. 以前是安装版的，重装系统后找了个不用安装的，想转个视频，结局如下：
By applying wavelet analysis method to image edge detection,multi scale operator of wavelet analysis functions well for noise resisting ability and picture edge reserving. 将小波分析方法应用于图像边缘检测领域,小波分析的多尺度算子在抗噪声和保留图像边缘的能力上有比较好的效果。
Using multi scale DEM datum, multi scale topographic index are extracted and mapped in the whole country and sample area in bess plateau, which prepare topographic datum basis for developing regional soil and water loss assessment model. （2）利用多尺度的DEM数据，提取了多尺度的水土流失地形指标，编制了全国及黄土高原典型样区的水土流失地形指标专题图件，为多尺度区域水土流失评价模型的建立准备了地形数据基础。
The conception of multi-scale Hilbert spectrum entropy(MSHSE)was proposed based on the multi scale analysis character of the local wave method(LWM)and its calculation method was developed. 基于局域波分析的时频多分辨特性,提出了多尺度Hilbert谱熵的概念,并给出了多尺度Hilbert谱熵的计算方法。
This paper describes a method to extract multi scale textural information from satellite SAR image using wavelet transformation. Then data fusion between satellite SAR image and TM image is implemented based on the wavelet texture information. 论述利用小波变换提取合成孔径雷达 (SAR)图像的多尺度纹理信息 ,基于小波纹理信息将SAR图像与TM图像进行融合。
The City Air Pollution Numerical Prediction System (CAPPS) consists of MM5 (or MM4) and the multi scale grid box model based on the integral of the atmospheric advective dispersion equation. 城市空气污染数值预报系统CAPPS ,是在ADPIC的概念的基础上经过积分求得的大气平流扩散的多尺度箱格预报模型。
Lossless compression bounds of images naturally acquired by various imaging sensors are estimated using a practical method based on multi scale conditional entropy and memory measurement. 为估计利用各类成像传感器自然获取图像的无损压缩极限,提出一个利用多尺度条件熵和记忆性度量的实用方法。
wavelet multi scale envelope spectrum 小波多尺度包络谱
The algorithm utilizes searching texture char act eristic scale and extracting the statistic characteristics on the texture ch arac teristic scale after continuous integer scale filtering to analyze the prop erty of texture. 该算法通过搜寻纹理图像的特征尺度并配合连续整数尺度滤波上的特征尺度统计对纹理进行分层分析。
In this paper, the factorization of scaling vector filters into prime factors is considered.A construction of bi-orthogonal wavelet matrix with pre-asigned scaling filter is given. 本文研究尺度滤波器的基本分解问题。基于所得结果,对于任意给定的尺度滤波器,给出了双正交小波矩阵的构造方案。
Abstract: In this paper, the factorization of scaling vector filters into prime factors is considered.A construction of bi-orthogonal wavelet matrix with pre-asigned scaling filter is given. 文摘:本文研究尺度滤波器的基本分解问题.;基于所得结果;对于任意给定的尺度滤波器;给出了双正交小波矩阵的构造方案
The next year the work went ahead on a large scale. 第二年这项工作就大规模进行了。
The project as being undertaken on a small scale. 这个工程在小规模地进行着。
Relay Auto-turning for PID Control Based on Scale Filter and Wavelet Denoising 基于尺度滤波与小波去噪的PID继电整定
This district grew cotton on a large scale. 这个地区过去大量种棉花。
Scale the fish before cooking them. 烧鱼之前先去掉鱼鳞。
The statue was made to scale, one inch to a foot. 这座塑像是按比例做的，大小是真人的十二份之一。
I weighed in at100 pounds on the scale today. 我今天在磅秤上称的体重为100磅。
It is hard to imagine the scale of the universe. 很难想像宇宙有多大。
They are preparing for war on a large scale. 他们正在大规模地备战。